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Taiwan Semiconductor Corporation 1V5KE91A
- Part No.:
- 1V5KE91A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1V5KE91A.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:7,948
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Product details
Overview
1V5KE91A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with 86.5V minimum breakdown voltage (VBR), 77.8V reverse stand-off voltage (VRWM), and 125V clamping voltage (VC) at 12.0A peak pulse current. It protects power rails and I/O lines against ESD, EFT, and inductive switching transients in industrial power supplies and automotive control modules.
For engineers reviewing the 1V5KE91A datasheet, 1V5KE91A pinout, 1V5KE91A application, or 1V5KE91A equivalent, key selection criteria include clamping performance under 10/1000μs surge, low leakage (<5μA at VRWM), thermal stability up to 175°C junction temperature, and DO-201 mechanical compatibility with high-reliability PCB layouts.
Technical Context
This TVS diode uses a glass-passivated silicon junction for stable avalanche behavior and low incremental surge resistance. Its unidirectional configuration enables asymmetric protection-blocking reverse conduction while clamping positive transients above VRWM.
The device meets JEDEC JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements. With 1ms pulse rating of 1500W and fast response time (<1ns), it delivers robust immunity against electrical fast transients (IEC 61000-4-4) and ESD events (IEC 61000-4-2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 77.8 V - Maximum continuous reverse operating voltage before significant leakage begins |
| VBR (min) | 86.5 V @ 1 mA - Minimum voltage at which avalanche breakdown initiates reliably |
| VC | 125 V @ 12.0 A - Clamped voltage during 10/1000μs surge, limiting downstream stress |
| PPPM | 1500 W - Peak pulse power handling capability for 1 ms transient events |
| IR @ VRWM | <5 μA - Low leakage ensures minimal standby power loss and signal integrity |
| TJMAX | 175 °C - Enables operation in high-temperature environments like engine control units |
| Package | DO-201 - Industry-standard axial leaded package with tin-plated leads per J-STD-002 |
Pinout & Package
1V5KE91A is a two-terminal unidirectional TVS diode in DO-201 package. Cathode is marked by a band on the body; anode is unmarked. Leads are pure tin-plated and solderable per J-STD-002. Weight: 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / Surge return path | Connected to ground or low-impedance return node; carries full surge current during clamping |
| Cathode | Protected line connection / Transient sensing node | Connected to the line being protected (e.g., 24V rail); voltage referenced to anode during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable, repeatable avalanche characteristics over lifetime and temperature |
| 1500W peak pulse power (1ms) | Withstands high-energy surges without degradation in industrial motor drive gate drivers |
| Clamping ratio VC/VBR ≈ 1.45 | Low overvoltage margin preserves margin for downstream 100V-rated MOSFETs and controllers |
| RoHS & halogen-free (IEC 61249-2-21) | Complies with environmental regulations for automotive and industrial end equipment |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in long-life applications such as railway signaling systems |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 24V DC input rail in programmable logic controller (PLC) power stage exposed to load dump and relay coil flyback. IC Role / Device Role: Primary overvoltage clamp placed between input and bulk capacitor. Use Value: Limits transient voltage to ≤125V, protecting 100V-input DC-DC controllers and reducing need for oversized input capacitors. |
Use Scenario: LIN bus line in BCM subjected to ISO 7637-2 Pulse 1/2a/3a transients and ESD contact discharge. IC Role / Device Role: Line-side TVS placed before LIN transceiver IC input. Use Value: Clamps 100V/100ns ESD pulses to <130V within 1ns, preserving transceiver integrity without adding series impedance. |
| Factory Automation Sensor Interface | Renewable Energy Inverter DC Link |
Use Scenario: 4–20mA analog sensor loop connected to PLC I/O module in dusty, high-noise factory environment. IC Role / Device Role: Bidirectional protection (using 1V5KE91CA variant) across signal pair. Use Value: Suppresses EFT bursts up to ±2kV (IEC 61000-4-4) while maintaining <1μA leakage at 24V, avoiding signal offset errors. |
Use Scenario: DC link between PV array and MPPT stage in string inverters, subject to lightning-induced surges. IC Role / Device Role: Parallel-mounted TVS on 600V-rated DC bus for secondary overvoltage backup. Use Value: Absorbs 1500W surge energy without thermal runaway, complementing primary MOV-based protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | Lower PPPM (600W), SMB package (smaller footprint), VRWM = 90V, VC = 129V @ 4.7A | Better suited for space-constrained consumer electronics; insufficient for 1500W industrial surges | Select when board area is critical and surge energy is ≤600W (e.g., USB-C PD protection) |
| 1N6294A | Same manufacturer, identical specs - alternate JEDEC part number for same 1V5KE91A device | No functional difference; used interchangeably in BOMs referencing JEDEC nomenclature | Use for legacy design documentation requiring JEDEC-compliant part marking |
Compared with SMBJ90A and 1N6294A, the 1V5KE91A provides higher surge robustness in a through-hole DO-201 package ideal for high-reliability industrial assemblies, whereas SMBJ90A trades power rating for compactness, and 1N6294A is a direct JEDEC-equivalent identifier.
Availability
1V5KE91A is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, factory automation sensor interfaces, and renewable energy inverter DC link protection requiring stable component supply and long-term lifecycle support.
Supply support for 1V5KE91A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with ISO 9001 and IATF 16949 certification.
The 1V5KExxA series was designed specifically for high-energy transient suppression in harsh industrial and automotive environments, emphasizing thermal robustness, surge repeatability, and long-term reliability under repeated overstress conditions.
FAQ
What is the maximum clamping voltage of the 1V5KE91A under standard test conditions?
The 1V5KE91A has a maximum clamping voltage (VC) of 125 V when subjected to a 10/1000 μs surge waveform at 12.0 A peak pulse current. This value is measured per IEC 61000-4-5 and ensures predictable overvoltage limiting for downstream components rated up to 100 V. The 1V5KE91A maintains this clamping performance across its full operating temperature range (−55°C to +175°C).
Is the 1V5KE91A suitable for bidirectional transient protection?
No - the 1V5KE91A is a unidirectional TVS diode intended for DC line protection where polarity is fixed. For bidirectional AC or symmetrical signal line protection, the 1V5KE91CA variant must be used. The "C" suffix denotes center-tapped construction enabling equal clamping in both directions, while the 1V5KE91A only clamps positive transients relative to its cathode terminal.
What is the reverse leakage current of the 1V5KE91A at its rated stand-off voltage?
At its reverse stand-off voltage (VRWM) of 77.8 V and ambient temperature of 25°C, the 1V5KE91A exhibits a maximum reverse leakage current (IR) of 5 μA. This low leakage preserves signal integrity in high-impedance sensor circuits and minimizes power loss in always-on industrial control systems using the 1V5KE91A.
Does the 1V5KE91A meet RoHS and halogen-free compliance standards?
Yes - the 1V5KE91A is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound contains no brominated flame retardants, and lead-free tin plating on DO-201 leads conforms to J-STD-002 solderability requirements. These attributes make the 1V5KE91A acceptable for use in automotive ECUs and industrial equipment sold in EU and other regulated markets.
What is the thermal derating behavior of the 1V5KE91A above 75°C ambient?
The 1V5KE91A's steady-state power dissipation derates linearly from 5 W at 75°C ambient to zero at 175°C junction temperature. Its pulse power rating remains 1500 W for 1 ms pulses regardless of ambient, but repetitive surge duty cycles require thermal analysis of PCB copper area and airflow. The 1V5KE91A's 175°C TJMAX supports operation in sealed enclosures near heat-generating power stages.
1V5KE91A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AD, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 12A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
1V5KE91A FAQ
1.How can I place an order for 1V5KE91A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1V5KE91A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1V5KE91A reliable?
The price and inventory of 1V5KE91A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1V5KE91A is usually 5 days.
3.What payment methods are accepted for 1V5KE91A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1V5KE91A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1V5KE91A?
1V5KE91A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1V5KE91A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1V5KE91A?
For technical support, including 1V5KE91A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1V5KE91A requirements.
6.How does Aetrix verify that 1V5KE91A is sourced from the original manufacturer or authorized distributors?
All 1V5KE91A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1V5KE91A meets industry standards.
7.What is the process for return or replacement of 1V5KE91A?
All 1V5KE91A units undergo pre-shipment inspection (PSI). If there is an issue with 1V5KE91A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1V5KE91A part is unused and in its original packaging.
Return procedure for 1V5KE91A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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